Tool gauge



W. OLEKSIN Jan. 22, 1957 TOOL GAUGE 2 Sheets-Sheet 1 Filed Jan. 19, 1955 W. OLEKSIN TOOL GAUGE Jan. 22, 1957 2 Sheets-Sheet 2 Filed Jan. 19, 1955 FIG.2

Patented Jan. 22, 1957 United dtates Patent conjunction with the embodiments exemplified on the drawings in which:

Fig. 1 is a front view of a multi-use gauge showing 2,778,122 a lathe tool bit being checked;

6 Fig. 2 is a rear view of the same gauge differently set TOOL GAUGE and in use for checking a drill; Fig. 3 is a lateral view from the right of Fig. 2; Wladyslaw Oleksm, Brooklyn, N. Y. Fig 4 is a top View; Application January 19, 1955, Serial No. 482,735 Fig. 5 is a section through part of the same gauge, the section being taken along the line VV in Fig. 4 5 Claims ((133-201) and some of the elements being shown disassembled;

and

Fig. 6 is a front view of another embodiment of the gauge.

My invention relates to gauges for the checking and The gauge illustrated in Figs. 1 through 5 comprises grinding of cutting tools such as tool bits for lathe Work, a body structure 1 of flat shape. The surface denotedby planing and milling; or the cutting tip of drills. lb in Figs. 1, 3, 4 and, 6 is hereinafter called the front The accurate maintenance of proper angles at the cutface for reference purposes. The lower portion of the ting portion of such tools is an important requirement body structure 1 may serve as a handle and forms a for modern mass production regardless of the material ruler with a straight edge 10 against which the tool being tool steel, high-speed steel, cast alloy, sintered carbide, checked is to he placed, as is shown in Fig. 1 for a tool diamondof which the tool is made. This applies espebit T and in Pig. 2 for a drill D. A straight slide bar cially to the cutting and clearance angles that provide a 2 of rectangular cross section is rigidly joined or inpa'ssage for chips at those places where the tool is not tegral with the body structure 1 to form part thereof actually in cutting engagement with the work piece Thus, The slide bar 2 extends at a right angle to the ruler edge it is often important to measure side cutting-edge angles, 10 and in parallel relation to the front face 111 of the end cutting-edge angles and front clearance angles when body structure. sharpening single-pointed tool-bits for lathes, screw ma- A slider 3, displaceably seated on slide bar 2, has a (1111158,v hdfiflg mills, h p r P a 16 Simil rly, a laterally extending member 4 which carries a stud 5; A checking of drills for proper lip angles is required. For threaded bore of stud 5 is in engagement with a mioptimum performance,- these angles may have to be given cmmeter or other screw spindle 6. The spindle exvarlous magnitudes depending upon the particular kind of tends parallel to the slide bar 2 and is journalled in a I QL- i 01 m t ia d W rk ma ria bearing stud 7 rigidly mounted on the slide bar 2. A

It is an Object of y invention to Provide a 11001 g g knurled knob 8 is secured to the end of spindle 6, and which not only affords the checking of angular relations a ring 9 on spindle 6 prevents it from axial displaceof the kind above mentioned but is also suitable for use e r lative t the stud '7. Revolution of spindle 6 with various cutting-tool bits and various drills. by e ati of th knob 8' causes the slider 3 to travel Ahothfil Object of tha invention is to Permlt Setting along the slide bar 2 A sleeve 10 secured to the slider the gauge t0 3 Phlrfihiy 0f (hfiereht and lndlvldually 3 by means of a screw 11 surrounds the free end of lhstahle angles relative to the Shhnk axis equivalent the spindle'6. The bore of sleevelti has a diameter larger reference H116 0f the i001 and to also Set the gauge to than that of spindle 6 so that there is no threaded eny desired spacing of the p Paint from that refergagement between sleeve and spindle, the sleeve 10 servence line, so that all these checks can be made at a jug merely t protect the spindle from damage. Single glame p y y Placing the i001 and the gauge A pivot pin 15 traverses a bore through a downwardly into a Single Position against each Othefextending projection of slider 3. The axis of pivot pin 15 T0 HChiGVB this versatility of adjustment and PP extends at a right angle to the place of front face 1b. ti n wi h a mu gauge according to my invention I Revolvably seated on spindle is are two flat members 16 Provide the gauge With 21 Preferably flat y Structure and 17, both shaped like protractors and of substantially having 21 P from face and forming a Straight ruler semicircular shape. The protractor 16 has a straight edge edge along which the tool being Checked is to be placed- 160 that extends parallel to the O-180 diameter of the A Slide l rigidly loihed integral with the d protractor. Member 17 has a similar straight edge 17c. structure to form P thereof, extends Parallel to the The protractor 16 has its center bore seated upon an ront face in transverse relation to the ruler edge and carannular h ld f a member 18 i tegral with pin 15 rl'fis a Slider With Pivot means Which define a P axis and is brazed to the member 18 so as to be rigidly se- Pefpendicular t0 the from face 0f the body structumcured to the spindle 15; A knurled knob is in threaded The Spacing of the P axis from the rule! edge thus engagement with the rear end 15c of spindle 15. When depends upon the chosen setting of the Slider along the knob 20 is loosened, the protractor 16 can be rotationally Slide bar as Will be explained, defihcs the P p? adjusted-to any desired angular position. To this end, Position of the mom) A fiat member Preferably the protractor 16 has on its front face a scale 16d of shaped as a protractor, is mounted on the slide in face-to angular i jci f 0480f, a d th f ntfa 15 of face relation to the from face of the body stYuFful'e n the body structure has. a reference line id for indicating has a Straight edge that can be Placed at any {1651f ed aflgle on the protrac'tor scale theangle to which the protractor relative to the first-mentioned edge by rotatlonal ad ustis set w g to h per position, the p'rotractor ment of the protractor about the pivot axis of the slider. 16 can be fastened by tightening the knob 20 (Fig Another f member defimng a third Straight edge Knob 20 then acts upon a washer 21 and a lock washer and conslstmg of another pfotractor or slmp W of 22 to prevent the protractor 16 from moving relative to is mounted on the slider in front of the first-mentioned the front face of the slider 3 P g; and g i if 3 55 2 3 23 55 2223; The member 17, also in the shape of a pro'tra'ctor, is T ace 6 g y rotatably seated on the shoulder portion of member position relative to the ruler edge. v b 1 p d d W p 1 Yon These and other features of my invention, as well as l P h y hh PQ 1 examples of its use and the advantages afforded thererelatlve t0 h Pmtractor by Placlng a refelhce by, will be apparent from the following description in mark of member 17"intoregi'stry with the proper admit-a value of protractor scale 16d. Member 17 has a number of openings 17b through which the scale 16d is visible. When placed in the proper angular position, the protractor member 17 is secured by means of a knob 24 which is in threaded engagement with the front end 15c of pivot pin 15. When tightened, the knob 24 exerts pressure against the protractor member 17 through an intermediate washer 2S and a lock washer 26. The intermediate washer 25 is then seated upon another shoulder 19 of member 18.

The handle-and-ruler portion of the body structure is preferably provided with an elongated slot lg to permit attaching an extension ruler 30 by means of screws 31, 32 when the gauge is to be used for checking drills or other tools of great length.

It will be apparent that the pivot axis of pin 15 can be set to any desired spacing from the ruler edge in. If desired, the body structure or slide bar 2 of the gauge may be provided with a scale as shown in Fig. 2 at 18 for indicating the selected spacing. The second edge 160 can be set to any desired angle relative to the ruler edge 1c by placing and fastening the protractor 16 in the corresponding angular position, this position being indicated by the zero reference line 1d in cooperation with the scale 16d (Fig. 1). The third edge 17c can likewise be placed and fastened in any desired angular position relative to edges 1c and 160, that position being indicated by the reference indicium of member 17 relative to the scale 16d.

In consequence, the gauge can be set to indicate various degrees of offset and various angular relations best suited for particular working conditions. One of the available uses of the gauge is exemplified in Fig. 1 with reference to a tool bit for lathe, planar or shaping work. The shank of the tool bit T is placed against the ruler edge 1c of the gauge. The tool bit can then be checked with respect to the following data: The proper location of the point of the tool is determined by the setting of the slider 3. The angle denoted by a (Fig. 1) indicates the proper nose angle at the point of the tool bit. The angle 5 indicates the proper shank angle. The angle 7 is the side cutting angle. The angle 8 is the end cutting edge angle. Consequently, the gauge can be pre-set in accordance with the particular angular relations available from the manufacturers instructions. It will be recognized that the same gauge can be used for gauging the end relief angle, lip angle and back rake angle of the same or similar tool bits, provided the tool bit is placed with its back against the ruler edge 10 and the gauge is pre-set in accordance with the particular angles to be measured.

For gauging the proper lip angles of a drill such as the drill shown at D in Fig. 2, the slider 3 is set in accordance with the diametric size of the drill, and the two protractor members 16 and 17 are set so that each corresponds to the same lip angle 6, this angle being the same for both cutting lips. It will be apparent that the gauge can be used for various sizes of drills and for checking not only the standard lip angle of 59 but also any larger or smaller angle that may be best suited for any particular tool or work material.

The gauge can be used for measuring the cutting angles of drills with one carbide cutting tip, such as small-size drills of the solid carbide type and larger drills with one brazed carbide cutting tip and two carbide wear-strips located at 90 and 183 behind the cutting edge respectively. The advantages of versatile and accurate adjustment of the gauge are particularly outstanding for all-depth carbide drills whose successful use depends upon the provision and maintenance of correct cutting and relief angles according to the tables of data supplied by thecarbide drill manufacturers.

The gauge can further be used for measuring countersinks during grinding to any desired angle such as 82,

, or others. It may further be used as a bevel protractor from 0 to 90.

The foregoing description and the recited modes of application and advantages are also applicable to the modified gauge illustrated in Fig. 6. This gauge differs from that of Figs. 1 to 5 in that the substantially semi-circular member 17 is substituted by an arm 27 of angular shape. The fiat arm 27 has a zero reference mark 27d for indicating the angular setting of arm 27 on the scale 16d of the protractor member 16. The scale 16d is visible through an opening 27b of arm 27.

While in the foregoing a full angular scale from 0 to is provided on the protractor member 16, such a scale may also be located on the front face 1b of the body structure 1 so that both pivotally-displaceable members may consist of arm structures each having one or several reference marks to coact with the angular scale of the body structure.

It will, therefore, be apparent to those skilled in the art, upon a study of this disclosure, that my invention permits of various modifications and may be embodied in designs other than those specifically illustrated and described, without departing from the essence of my invention and within the scope of the claims annexed hereto.

I claim:

1. A tool-bit gauge, comprising an elongated planar body structure forming a handle and having a straight first edge parallel to its longitudinal direction, a bar rigidly joined with said structure and extending transverse to said first edge, a slider mounted on said bar and having pivot means defining a pivot axis perpendicular to the plane of said structure, said slider being displaceable along said bar for setting said pivot axis to a desired spacing from said first edge, a fiat member disposed in parallel relation to the plane of said structure and in face-to-face relation to said structure, said fiat member having a straight second edge and being pivotally mounted on said pivot means of said slider for angular adjustment of said second edge about said pivot axis to a desired angular position relative to said first edge, and another member having a straight third edge and being mounted on said slider in face-to-face relation to said first-mentioned member, said other member being pivotally adjustable about said pivot axis for setting said third edge to a desired angular position relative to said second edge.

2. A tool-bit gauge, comprising a rigid base structure having planar front face and having a straight first edge in the plane of said front face, said structure having a bar extending transverse to said first edge and forming a straight slide way perpendicular to said first edge, a slider displaceable on said bar along said slide way, a screw spindle connecting said base structure and said slider, said spindle being revolvable for displacing said slider, said sliderhaving a pivot pin defining a pivot axis perpendicular to the front-face plane of said base structure, a protractor pivotally mounted on said pivot pin in parallel relation and adjacent to said front face, said protractor having a center on said pivot axis, said protractor having a straight second edge and said structure having a reference mark correlated with said protractor for setting said second edge to a desired angular position relative to said first edge, and a member having a straight third edge and being mounted on said pivot pin of said slider in face-toface relation to said protractor, said member being pivotally adjustahle about said pivot axis for setting said third edge to a desired angular position relative to said second edge, and two fastening means mounted onsaid slider for individually securing said protractor means and said member in said respective positions.

3. A tool-bit gauge, comprising an elongated body structure having a planar front face and forming a straight first edge in the plane of said front face and parallel to the longitudinal direction of said structure, a bar rigidly joined with said structure and extending transverse to said said protractors being individually adjustable about said pivot axis for setting each of said protractor edges to a desired angle relative to said first edge.

4. A tool-bit gauge, comprising a body structure having second edge.

5. A tool gauge, comprising a body having a plane front face and having a first straight edge, said body having a slide bar at a right angle to said first edge, a slider displaceably mounted on References Cited in the file of this patent UNITED STATES PATENTS 

